Here's a presentation by Obie Fernandez on running a consulting business. There are some good ideas here. I like the part near the end (30 minute mark) where he says that they don't tolerate asshole clients. He provides an example of client "misbehaviour." His remedy was that the person had to apologize to the entire team.
This ties in well to the book The No Asshole Rule by Bob Sutton. Obie's goal is to head off "asshole poisoning." By not allowing this behaviour, he maintains a good working environment.